Total bridges
781
Public highway bridges in Johnson County
County profile · official public datasets
Johnson County, KS
781 public highway bridges tracked in the FHWA National Bridge Inventory: 75% rated Good, 23.6% Fair, 1.4% Poor.
- 781
- Public bridges
- 75%
- Good condition
- 1.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Johnson County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 21%
- lowest Poor share in state
- 1.4%
- Poor-condition share
- 781
- public highway bridges
- 1992
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Johnson County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Johnson County ranks #22 of 104 Kansas counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.4%). Johnson County, Kansas contains 781 public highway bridges. Roughly 75% are rated “Good,” 23.6% “Fair,” and 1.4% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
75%
586 of 781 rated 7-9
Fair condition
23.6%
184 of 781 rated 5-6
Poor condition
1.4%
11 of 781 rated 4 or below
In-state Poor-share rank
#22 of 104
Among Kansas counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 781 NBI-tracked bridges by lowest applicable component rating.
Good 75% (586)
Fair 23.6% (184)
Poor 1.4% (11)
Johnson County's Poor-condition bridges carry 61,312 vehicle crossings a day
That is 0.7% of the county's reported daily bridge traffic on 1.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 5,574 crossings a day against 11,009 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 781 of 781 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
18.4% of Johnson County's bridges have passed the 50-year mark
144 of the 781 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 75% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 39.1% of the county's Poor-condition bridge traffic
COLLEGE BLVD over INDIAN CK, built 1976, carries 24,000 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 11-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 61,312 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Johnson County's bridges were built
781 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 29
1950–1959
29 bridges
- 1960s 65
1960–1969
65 bridges
- 1970s
1970–1979
80 bridges
- 1980s
1980–1989
111 bridges
- 1990s
1990–1999
186 bridges
- 2000s
2000–2009
141 bridges
- 2010s
2010–2019
130 bridges
- 2020s 26
2020–2029
26 bridges
What this shows Construction peaked in the 1990s, when 186 of the county's bridges still in the inventory were built, which is 23.8% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1992, 20 years newer than the Kansas average of 1972.
How Johnson County compares with Kansas's closest counties by inventory size
The 5 Kansas counties nearest Johnson County in number of bridges, with their condition splits. Its 1.4% Poor share is the 2nd-lowest of these 6. Its average build year of 1992 against a peer-group mean of 1977 is 15 years newer.
Showing the 5 closest of 103 Kansas counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Johnson County (this page) | 781 | 75% | 23.6% | 1.4% | 1992 |
| Sumner County | 659 | 50.2% | 47.2% | 2.6% | 1978 |
| Butler County | 591 | 59.2% | 34.7% | 6.1% | 1966 |
| McPherson County | 586 | 66.6% | 32.8% | 0.7% | 1979 |
| Reno County | 573 | 51.8% | 42.1% | 6.1% | 1980 |
| Shawnee County | 563 | 62.9% | 34.1% | 3% | 1981 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Johnson County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Johnson County, both outside Kansas so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside KS (781 bridges here).
- Baltimore County, MD · 783 bridges
- Hamilton County, OH · 783 bridges
- El Paso County, TX · 783 bridges
- Fulton County, GA · 775 bridges
Similar average build year
Nearest mean year-built outside KS (1992 here).
- Wake County, NC · avg 1992 · 760 bridges
- Benton County, AR · avg 1992 · 410 bridges
- Nodaway County, MO · avg 1992 · 396 bridges
- Cameron County, TX · avg 1992 · 355 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (184)
79TH ST
FairOver: TURKEY CK TRIB
250 W OF MASTIN, Johnson, KS
Built 1966 Load: 43.5 t ADT: 5,800
RENNER RD
FairOver: I435 HWY
JCT RENNER RD/I435, Johnson, KS
Built 1982 Load: 43.5 t ADT: 5,419
69 SB (SWTZ RD
FairOver: I435 HWY
JCT US69ALT/I435 SB, Johnson, KS
Built 1965 Load: 43.6 t ADT: 44,100
83RD ST. F.4-16.5
FairOver: KILL CREEK
E. DESOTO, Johnson, KS
Built 1989 Load: 44.4 t ADT: 7,300
162ND TERR
FairOver: GARDNER LAKE TRIB.
S. END OF GARDNER LAKE, Johnson, KS
Built 1988 Load: 44.5 t ADT: 330
METCALF AVE.
FairOver: INDIAN CREEK TRIB.
0.2 MI N OF 103RD ST., Johnson, KS
Built 1965 Load: 44.5 t ADT: 41,000
151ST STREET
FairOver: US169/K-7 & I-35 HWYS
151ST STREET & I-35 JCT, Johnson, KS
Built 1995 Load: 45.4 t ADT: 34,492
SB Bl Valley Pkwy
FairOver: NB US 69 HWY
3.08 MI S I435, Johnson, KS
Built 1966 Load: 45.4 t ADT: 12,919
RENNER RD
FairOver: TUCKER BRANCH CREEK
2.0E 0.6S OF SPRING HILL, Johnson, KS
Built 1993 Load: 46.3 t ADT: 110
US69 HWY NB-SB
FairOver: 139TH STREET
0.50 MI S 135 TH STREET, Johnson, KS
Built 1966 Load: 46.3 t ADT: 31,021
US69 HWY NB
FairOver: TOMAHAWK CR & PED PASS
4.11 MI S I435, Johnson, KS
Built 1966 Load: 46.9 t ADT: 31,021
191ST ST.
FairOver: WOLF CREEK TRIB.
1000 W OF SWITZER, Johnson, KS
Built 1987 Load: 47.2 t ADT: 700
K10 HWY WB
FairOver: CEDAR CREEK PKWY
9.95MI E DGLS CO LN, Johnson, KS
Built 1974 Load: 48.1 t ADT: 18,260
K10 HWY EB
FairOver: CEDAR CREEK PKWY
9.94MI E DGLS CO LN, Johnson, KS
Built 1974 Load: 48.1 t ADT: 18,260
103RD ST
FairOver: INDIAN CK
1600 E OF US-69, Johnson, KS
Built 1978 Load: 49.0 t ADT: 14,000
95TH ST
FairOver: TRIB. TO KANSAS RIVER
0.6W OF K-10, Johnson, KS
Built 1987 Load: 49.1 t ADT: 120
183RD ST
FairOver: US69 HWY NB-SB
4.02 MI N MIAMI COLN, Johnson, KS
Built 1967 Load: 49.5 t ADT: 1,037
I-435 HWY WB
FairOver: CRD STATE LINE RD
JCT STATE LINE / I-435, Johnson, KS
Built 1994 Load: 50.3 t ADT: 77,188
ANTIOCH RD
FairOver: I-35 Hwy
1.5 MI SW OF JO COLIINE, Johnson, KS
Built 1998 Load: 52.6 t ADT: 14,237
EDGERTON RD
FairOver: MARTIN CREEK
0.25N OF EDGERTON, Johnson, KS
Built 1994 Load: 54.7 t ADT: 600
EDGERTON RD
FairOver: MARTIN CREEK TRIB.
0.3N OF EDGERTON, Johnson, KS
Built 1994 Load: 54.8 t ADT: 600
191ST ST
FairOver: BIG BULL CREEK
3.1W OF I-35, Johnson, KS
Built 1990 Load: 56.3 t ADT: 70
STATE LINE RD
FairOver: MASSEY CREEK
2.2E 1.7S OF STILLWELL, Johnson, KS
Built 1992 Load: 59.3 t ADT: 50
183RD ST
FairOver: WOLF CREEK
1.3E 3.5N OF SPRING HILL, Johnson, KS
Built 1987 Load: 59.7 t ADT: 390
SWITZER RD.
FairOver: TOMAHAWK CK TRIB
2600 N. of 151st St., Johnson, KS
Built 2009 Load: 59.7 t ADT: 8,400
FOSTER ST.
FairOver: TOMAHAWK CK TRIB
900 S. OF 129TH ST., Johnson, KS
Built 1998 Load: 60.8 t ADT: 4,500
130TH ST.
FairOver: TOMAHAWK CK TRIB
800 W. OF METCALF, Johnson, KS
Built 1998 Load: 60.9 t ADT: 2,500
123RD ST.
FairOver: TOMAHAWK CK TRIB
400 E. OF METCALF, Johnson, KS
Built 2000 Load: 68.8 t ADT: 6,000
133RD ST.
FairOver: TOMAHAWK CK TRIB
1000 E. OF ANTIOCH, Johnson, KS
Built 2000 Load: 87.5 t ADT: 7,700
QUIVIRA RD.
FairOver: INDIAN CK N BRANCH
400 S OF I-435, Johnson, KS
Built 1974 Load: 90.5 t ADT: 43,000
GARDNER H.0-16.6
FairOver: CEDAR CREEK TRIB.
1.7N OF K-10, Johnson, KS
Built 1982 Load: 90.5 t ADT: 215
HEMLOCK ST.
FairOver: TOMAHAWK CK TRIB
200 S. OF 133RD ST., Johnson, KS
Built 2000 Load: 90.5 t ADT: 7,500
NALL AVE.
FairOver: TOMAHAWK CK TRIB
188 S OF 121ST ST, Johnson, KS
Built 1994 Load: 90.5 t ADT: 25,400
95TH ST.
FairOver: INDIAN CK TRIB NO 1
500 W. OF ROE, Johnson, KS
Built 1980 Load: 94.3 t ADT: 17,300
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.